India, April 26 -- Cole Tomas Allen, the suspect in the shooting at the White House Correspondents' Dinner, authored a "manifesto" indicating his intention to specifically target officials within the administration, a senior U.S. official told CBS News.

Authorities discovered anti-Trump and anti-Christian sentiments on the suspect's social media profiles, CBS reported, citing the officials.

Cole Allen, 31, communicated some of his writings to family members prior to the attempted attack on Saturday, prompting one of them to notify the police regarding these writings. It appears that the writings shared with family did not explicitly reference the White House Correspondents' Dinner.

A family member interviewed by investigators following...